Infrared-excited color-changing ultraviolet-curable 3D printing method

Abstract

The present invention discloses an infrared-excited color-changing ultraviolet light-curing 3D printing method, which relates to the technical field of 3D printing. An infrared lamp array and a ultraviolet lamp array are set, and a light illumination space model is constructed corresponding to the infrared lamp array and the ultraviolet lamp array; a 3D target object model is determined, and the 3D target object model is combined with the light illumination space model to obtain a 3D printing model; the required light illumination information of the 3D target object model is obtained, and the 3D printing model is laid out based on the required light illumination information to obtain a required 3D printing model; the infrared lamp array and the ultraviolet lamp array are controlled for lighting according to the required 3D printing model to complete the printing of the 3D target object. The present invention uses the 3D printing model after rolling layout as the required 3D printing model, which can ensure the accuracy and orderliness of the excitation color change of the 3D target object during the printing process, make the color-changing irradiation control more accurate, and improve the printing quality of the 3D target object.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printing, and particularly to an infrared-excited color-changing ultraviolet-curing 3D printing method. Background Art

[0002] 3D printing with resin as the material is a process of curing while printing. Specifically, resin 3D printing is a process of using a photocuring technology to cure resin materials layer by layer into a three-dimensional entity. Its principle is mainly that a photosensitive resin material undergoes a polymerization reaction under the irradiation of ultraviolet light with a specific wavelength, and its form changes from liquid to solid. In addition, with the requirement for the color of the printed object, it can change color according to the infrared-excited printing material. Infrared excitation usually involves the absorption and conversion of infrared light by the material, and corresponding infrared light wavelength parameters need to be set for different colors. At present, it is difficult to accurately correspond and irradiate the light parameters in the 3D printing process, and it is difficult to ensure the accuracy and orderliness of the excitation color change of the 3D target object during the printing process, and the printing quality of the 3D printing target object cannot be guaranteed. Summary of the Invention

[0003] The purpose of the present invention is to provide an infrared-excited color-changing ultraviolet-curing 3D printing method to solve the deficiencies in the background art.

[0004] To achieve the above purpose, the present invention provides the following technical solution: An infrared-excited color-changing ultraviolet-curing 3D printing method, comprising the following steps:

[0005] Set an infrared lamp array and an ultraviolet lamp array, and construct a lighting space model corresponding to the infrared lamp array and the ultraviolet lamp array;

[0006] Determine the 3D target object model, and combine the 3D target object model with the lighting space model to obtain a 3D printing model;

[0007] Obtain the required lighting information of the 3D target object model, and layout the 3D printing model based on the required lighting information to obtain a required 3D printing model;

[0008] According to the required 3D printing model, control the lighting of the infrared lamp array and the ultraviolet lamp array respectively, and then complete the printing of the 3D target object.

[0009] In a preferred embodiment, the step of setting the infrared lamp array and the ultraviolet lamp array and constructing a lighting space model corresponding to the infrared lamp array and the ultraviolet lamp array includes:

[0010] Determine the first lighting space, and arrange the infrared lamp array according to the first lighting space;

[0011] Determine the second lighting space, and arrange the ultraviolet lamp array according to the second lighting space;

[0012] Construct a lighting space model according to the infrared light lamp array, the ultraviolet light lamp array, and the printing space of the 3D printing device.

[0013] In a preferred embodiment, the step of determining the first lighting space and arranging the infrared light lamp array according to the first lighting space includes:

[0014] Determine the first arrangement range and the first lighting range, and obtain the space range between the first arrangement range and the first lighting range as the first lighting space;

[0015] Divide the first lighting range into multiple sub-ranges, and map and project the multiple sub-ranges onto the first arrangement range in the first lighting space respectively to obtain multiple sub-projection ranges;

[0016] Arrange infrared light lamps corresponding to the multiple sub-projection ranges respectively, and associate the infrared light lamps corresponding to the multiple sub-projection ranges as the infrared light lamp array.

[0017] In a preferred embodiment, the step of dividing the first lighting range into multiple sub-ranges according to the first lighting range and mapping and projecting the multiple sub-ranges onto the first arrangement range in the first lighting space respectively to obtain multiple sub-projection ranges includes:

[0018] Divide the first lighting range into multiple sub-ranges according to the preset unit corresponding to the first lighting range;

[0019] Perform spatial superposition based on the multiple sub-ranges respectively to obtain mapping channels until the mapping channels pass through the first arrangement range. The surface passing through the first arrangement range is used as the projection range, and the corresponding sub-ranges, mapping channels, and projection ranges are spatially bound;

[0020] Obtain multiple sub-projection ranges through the multiple sub-range spaces.

[0021] In a preferred embodiment, the step of determining the 3D object model and combining the 3D object model with the lighting space model to obtain the 3D printing model includes:

[0022] Obtain the shape information of the 3D object, where the shape information includes the shape and the shape color information, and construct the 3D object model according to the shape information;

[0023] Construct the 3D object model into the lighting space model to obtain the combined 3D printing model.

[0024] In a preferred embodiment, the step of obtaining the required lighting information of the 3D object model, arranging the 3D printing model based on the required lighting information, and obtaining the required 3D printing model includes:

[0025] Obtain the corresponding required illumination information based on the external shape color information on the 3D object model, where the required illumination information includes the required infrared light irradiation range and the corresponding required infrared light wavelength;

[0026] Mark the required illumination information on the 3D object model in the 3D printing model and perform a scrolling layout to obtain the required 3D printing model.

[0027] In a preferred embodiment, the step of marking the required illumination information on the 3D object model in the 3D printing model and performing a scrolling layout to obtain the required 3D printing model includes:

[0028] Mark the required illumination information in the 3D object model in the 3D printing model;

[0029] Extract the outer contour of the 3D object model marked with the required illumination information to obtain a contour map of the required illumination information;

[0030] Fold the contour map according to the first illumination range to obtain a multi-layer folded contour map, and respectively correspond the folded contour map of each layer to the first illumination range in terms of orientation;

[0031] Obtain the corresponding relationship between the folded contour map of each layer corresponding in orientation and the sub-range on the first illumination range;

[0032] Based on the folded contour map of each layer corresponding to the sub-range in the corresponding relationship, the spatially bound sub-range, the mapping channel, and the projection range, obtain the infrared light lamps corresponding to the folded contour map of each layer;

[0033] For each folded contour map, set the infrared light wavelength parameters of the infrared light lamps in the corresponding infrared light lamp array to obtain a target infrared light lamp array, and perform a scrolling layout on the target infrared light lamp arrays corresponding to the folded contour maps of each layer according to the printing sequence before and after the 3D object;

[0034] Take the 3D printing model after the scrolling layout as the required 3D printing model.

[0035] In a preferred embodiment, the step of respectively controlling the lighting of the infrared light lamp array and the ultraviolet light lamp array according to the required 3D printing model, and then completing the printing of the 3D object includes:

[0036] Print the 3D object according to the required 3D printing model. During the printing process of the 3D object, control the infrared light wavelength parameters of the infrared light lamp array through the folded contour map in the scrolling layout to excite color change of the 3D object;

[0037] The ultraviolet light lamp array is constantly on to cure the 3D object during the printing process until the printing of the 3D object is completed.

[0038] In the above technical solution, the technical effects and advantages provided by the present invention are as follows:

[0039] For each layer of folding contour diagram of the present invention, the infrared light wavelength parameters of the infrared light lamps in the corresponding infrared light lamp array are set to obtain the target infrared light lamp array. The target infrared light lamp arrays corresponding to each layer of folding contour diagram are arranged in a rolling manner according to the printing sequence before and after of the 3D object. Here, the rolling layout means sorting the target infrared light lamp arrays corresponding to each layer of folding contour diagram according to the printing sequence before and after of the 3D object. After the 3D object is irradiated by one target infrared light lamp array during the printing process, the next irradiation is sorted to the next target infrared light lamp array until the entire 3D object is printed. The 3D printing model after the rolling layout is used as the required 3D printing model, which can ensure the accuracy and orderliness of the color change excitation of the 3D object during the printing process, and better ensure the printing quality of the 3D printed object. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0041] Figure 1 It is a flowchart of the method of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0042] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0043] Embodiment 1. Please refer to Figure 1 As shown, the infrared excitation color change ultraviolet light curing 3D printing method in this embodiment includes the following steps:

[0044] S1. Set the infrared light lamp array and the ultraviolet light lamp array, and construct a light space model corresponding to the infrared light lamp array and the ultraviolet light lamp array;

[0045] S2. Determine the 3D object model, and combine the 3D object model with the light space model to obtain a 3D printing model;

[0046] S3. Obtain the required illumination information of the 3D object model, and layout the 3D printing model based on the required illumination information to obtain the required 3D printing model;

[0047] S4. According to the required 3D printing model, control the illumination of the infrared lamp array and the ultraviolet lamp array respectively, and then complete the printing of the 3D object;

[0048] As described in the above steps S1 - S4, 3D printing with resin as the material is a process of curing while printing. Specifically, resin 3D printing is a process of using photocuring technology to cure resin materials layer by layer into a three-dimensional entity. Its principle is mainly that the photosensitive resin material undergoes a polymerization reaction under the irradiation of ultraviolet light with a specific wavelength, and its form changes from liquid to solid. In addition, with the requirement for the color of the printed object, it can change color according to the infrared-excited printing material. Infrared excitation usually involves the absorption and conversion of infrared light by the material, and corresponding infrared light wavelength parameters need to be set for different colors. Currently, it is difficult to accurately correspond and irradiate the illumination parameters during the 3D printing process, making it difficult to ensure the accuracy and orderliness of the excitation color change of the 3D object during the printing process, and unable to guarantee the printing quality of the 3D printed object. In this application, for each layer of folding contour map, the infrared light wavelength parameters of the infrared lamps in the corresponding infrared lamp array are set to obtain the target infrared lamp array. The target infrared lamp arrays corresponding to each layer of folding contour map are arranged in a rolling manner according to the printing sequence of the 3D object. Here, the rolling arrangement means sorting the target infrared lamp arrays corresponding to each layer of folding contour map according to the printing sequence of the 3D object. After the 3D object is irradiated by one target infrared lamp array during the printing process, the next irradiation is sorted to the next target infrared lamp array until the entire 3D object is printed. Taking the 3D printing model after the rolling arrangement as the required 3D printing model can ensure the accuracy and orderliness of the excitation color change of the 3D object during the printing process, and better guarantee the printing quality of the 3D printed object.

[0049] In one embodiment, the step S1 of setting the infrared lamp array and the ultraviolet lamp array and constructing an illumination space model corresponding to the infrared lamp array and the ultraviolet lamp array includes:

[0050] S11. Determine the first illumination space, and arrange the infrared lamp array according to the first illumination space;

[0051] S12. Determine the second illumination space, and arrange an ultraviolet lamp array according to the second illumination space. There is no limited range for the ultraviolet lamp array here, which is mainly used to cure the object during the 3D printing process. Therefore, as long as it can irradiate the object for curing, no specific corresponding setting is required, and a reasonable position is sufficient. However, the infrared lamp array needs to be set specifically corresponding to the printing position of the object. Due to the color of the object, it is necessary to ensure the corresponding range of the infrared lamp array, so as to facilitate the subsequent color change excitation of the object;

[0052] S13. Construct an illumination space model according to the infrared lamp array, the ultraviolet lamp array, and the printing space of the 3D printing device;

[0053] As described in the above steps S11 - S13, the first illumination space here is the space where the infrared lamp array is arranged. The second illumination space is the space where the ultraviolet lamp array is arranged. The ultraviolet lamp array here is used for curing the 3D printing material. Therefore, as long as the ultraviolet lamp array can irradiate the 3D printing material to be cured in the second illumination space, no special arrangement method is required. The irradiation principle of ultraviolet light and infrared light in 3D printing here is as follows: Infrared excitation for color change and ultraviolet light curing of 3D printing materials consists of resin and photoinitiator monomers. Infrared light at 760nm excites red pigments, infrared light at 780nm excites yellow pigments, infrared light at 800nm excites blue pigments, and infrared light at 920nm excites black pigment additives; The 3D printing solid object is printed by using the ultraviolet light curing printing method. The 3D printing solid object is excited by infrared lasers of different wavelengths, and corresponding colors or superimposed corresponding colors are generated at the corresponding laser excitation points. Thus, the solid object becomes colorful, which can meet the color requirements of better 3D printed objects. The first illumination space and the second illumination space can be the same space range, or a space range with an overlapping part, or a space range with no position overlap relationship in actual use. After arranging the infrared lamp array and the ultraviolet lamp array, an illumination space model is constructed according to the infrared lamp array, the ultraviolet lamp array, and the printing space of the 3D printing device. The illumination space model here is the internal three-dimensional model of the printing space of the 3D printing device with the infrared lamp array and the ultraviolet lamp array arranged, which can reflect the internal situation with the infrared lamp array and the ultraviolet lamp array arranged, facilitate the subsequent color change treatment of the 3D printing object, better set the required illumination information for the subsequent 3D product printing, facilitate the excitation color change and curing treatment of the illumination product, and ensure the manufacturing quality of the 3D product.

[0054] In one embodiment, the step S11 of determining the first illumination space and arranging the infrared lamp array according to the first illumination space includes:

[0055] S111. Determine the first arrangement range and the first illumination range, and obtain the space range between the first arrangement range and the first illumination range as the first illumination space;

[0056] S112. Divide the first illumination range into multiple sub - ranges, and map and project onto the first deployment range in the first illumination space according to the multiple sub - ranges to obtain multiple sub - projection ranges;

[0057] S113. Infrared lamps are respectively deployed corresponding to the multiple sub - projection ranges, and the infrared lamps corresponding to the multiple sub - projection ranges are associated as an infrared lamp array.

[0058] As described in the above steps S111 - S113, the first deployment range and the first illumination range here are equivalent to first determining a suitable range for deploying infrared lamps, and then determining a range that needs to be irradiated during the 3D printing process as the first illumination range. For example, during the process of 3D printing a three - dimensional object, for a bottom - up SLA (Stereolithography) 3D printer, the light source is usually located below the bottom of the resin tank. Then, the lower part in the printing space inside the 3D printer is the set range of the first illumination range. After that, a spatial range is established between the first deployment range and the first illumination range. Here, there is a full - coverage corresponding relationship between the first deployment range and the first illumination range. For example, the outer side of a circular ring and the inner side of a circular ring with a larger diameter. In this way, a spatial range is established between the outer side of a circular ring and the inner side of a circular ring with a larger diameter to fully cover the outer side of a circular ring and the inner side of a circular ring with a larger diameter. Then, this spatial range serves as the first illumination space. This first illumination space represents the first deployment range and the first illumination range, and at the same time represents the space between the first deployment range and the first illumination range. The first deployment range and the first illumination range are planes, and both the first deployment range and the first illumination range are represented by a range in the shape of a circular band. After that, in order to deploy infrared lamps, it is necessary to divide the first illumination range into multiple sub - ranges, and map and project onto the first deployment range in the first illumination space according to the multiple sub - ranges to obtain multiple sub - projection ranges. After obtaining the multiple sub - projection ranges, infrared lamps are respectively deployed corresponding to the multiple sub - projection ranges. One infrared lamp is set for one sub - projection range. This infrared lamp is a direct - light lamp, which reduces light divergence. Thus, it can ensure the accuracy of the irradiation range, will not affect the irradiation in other ranges, and has a good 3D object color - changing operation. Then, the infrared lamps corresponding to the multiple sub - projection ranges are associated as an infrared lamp array, which can better set the infrared lamp array so that subsequent irradiation and color - changing are carried out according to the 3D target object, and has good operability.

[0059] In one embodiment, the step S112 of dividing the first illumination range into multiple sub - ranges and mapping and projecting onto the first deployment range in the first illumination space according to the multiple sub - ranges includes:

[0060] S1121. Divide the first illumination range into multiple sub - ranges according to the preset division units corresponding to the first illumination range;

[0061] S1122. Perform spatial superposition based on multiple sub - ranges respectively to obtain mapping channels until the mapping channels pass through the first layout range. The surface passing through the first layout range is used as the projection range, and the corresponding sub - ranges, mapping channels, and projection ranges are spatially bound;

[0062] S1123. Obtain multiple sub - projection ranges through multiple sub - range spaces.

[0063] As described in the above steps S1121 - S1123, both the first illumination range and the first layout range exist in the form of a circular band here. Therefore, it is equivalent to dividing the circular band into multiple sub - ranges according to the preset division units. Most of the multiple sub - ranges are the same in range and shape as the preset division units. Only at the edge positions, there are cases where the divided ranges and shapes do not reach the preset division units. These insufficient cases are also divided into multiple sub - ranges as one preset division unit. Then, starting from the sub - ranges for spatial superposition is equivalent to spatially extending and projecting onto the first layout range according to the shape and range of the sub - ranges. The channel of spatial superposition is used as the mapping channel. Here, it means that the range on the first layout range through which the mapping channel passes is used as the projection range. The angles of the multiple sub - ranges spatially superposed on the first layout range are not consistent, but they are all projected within the first layout range, and there is no overlapping mapping range projected within the first layout range, indicating that one mapping range corresponds to one sub - range, and there cannot be any case of partial overlap or complete rewrite. Then, the corresponding sub - ranges, mapping channels, and projection ranges are spatially bound, representing that the three are in one - to - one correspondence. Obtaining multiple sub - projection ranges through multiple sub - range spaces can facilitate the subsequent parameter setting for infrared lamp - illuminated color - changing 3D objects, has good operability, can better meet the color requirements of 3D objects, makes the color - changing irradiation control more accurate, and improves the printing quality of 3D objects;

[0064] In one embodiment, step S2 of determining the 3D object model and combining the 3D object model with the illumination space model to obtain the 3D printing model includes:

[0065] S21. Obtain the shape information of the 3D object, where the shape information includes the shape and color information of the shape. Construct a 3D object model according to the shape information;

[0066] S22. Build the 3D object model into the illumination space model to obtain the combined 3D printing model;

[0067] As described in the above steps S21 and S22, before printing a 3D object, it is necessary to construct a model of the 3D object in advance. By collecting the external shape and external color information of the 3D object as the external information, where the external shape includes the structure of the external shape and the corresponding dimensions. Then, a 3D object model is constructed three-dimensionally based on the external information. The obtained 3D object model will be constructed in the illumination space model to obtain a combined 3D printing model. At this time, the positional relationship between the 3D object model and the illumination space model in the 3D printing model is the printing position of the 3D object during subsequent printing. Finally, in the real situation, after the 3D object is printed, the positional relationship between the 3D object and the illumination space model is the set position and angle of the 3D object in the 3D printing model at this time. Here, the printing parameters of the 3D printing device for the 3D object are set, and subsequent printing can be carried out according to the construction position and angle of the 3D object. Subsequently, only the corresponding excitation color change of the external color information of the 3D object needs to be carried out;

[0068] In one embodiment, step S3 of obtaining the required illumination information of the 3D object model and laying out the 3D printing model based on the required illumination information includes:

[0069] S31. Obtain the corresponding required illumination information according to the external color information on the 3D object model, where the required illumination information includes the required infrared light irradiation range and the corresponding required infrared light wavelength;

[0070] S32. Mark the required illumination information on the 3D object model in the 3D printing model and perform a rolling layout to obtain the required 3D printing model;

[0071] As described in the above steps S31 and S32, the external color information here is designed for the 3D object in advance. Here, the corresponding infrared light irradiation range and the corresponding required infrared light wavelength are obtained through the external color information as the required illumination information. The external color information here includes the range of the external color corresponding to the 3D object model and the corresponding color. After determining the required illumination information, it is marked on the 3D object model. Then, according to the 3D object model marked with the required illumination information, a rolling layout is performed on the infrared lamp array to obtain the required 3D printing model. The 3D printing model here is set with the infrared lamp array and the infrared light wavelength parameters during the 3D object printing process. After setting the required 3D printing model, the actual 3D object printing can be carried out;

[0072] In one embodiment, step S32 of marking the required illumination information on the 3D object model in the 3D printing model and performing a rolling layout to obtain the required 3D printing model includes:

[0073] S321. Mark the required lighting information in the 3D object model of the 3D printing model;

[0074] S322. Extract the outer contour of the 3D object model marked with the required lighting information to obtain a contour map of the required lighting information;

[0075] S323. Fold the contour map according to the first lighting range to obtain a multi-layer folded contour map, and respectively correspond the folded contour map of each layer to the first lighting range in terms of orientation;

[0076] S324. Obtain the corresponding relationship between the folded contour map of each layer corresponding in orientation and the sub-range on the first lighting range;

[0077] S325. Based on the folded contour map of each layer corresponding in the corresponding relationship, the sub-range, the spatially bound sub-range, the mapping channel, and the projection range, obtain the infrared lamps corresponding to the folded contour map of each layer respectively;

[0078] S326. For each folded contour map, set the infrared light wavelength parameters of the infrared lamps in the corresponding infrared lamp array to obtain the target infrared lamp array, and perform a rolling layout on the target infrared lamp array corresponding to the folded contour map of each layer according to the printing sequence before and after the 3D object;

[0079] S327. Take the 3D printing model after the rolling layout as the required 3D printing model;

[0080] As described in the above steps S321 - S327, the required illumination information is marked in the 3D object model. Here, the marking is performed according to the color distribution range. After that, the 3D object model with the marked required illumination information is subjected to outer contour extraction to obtain a contour map of the required illumination information. Here, the distribution of the required illumination information according to the outer contour of the 3D object model is extracted as the contour map. Then, the contour map is folded according to the first illumination range to obtain a multi-layer folded contour map. The folded contour maps of each layer are respectively oriented corresponding to the first illumination range. Since it is irradiated according to the first illumination range, the first illumination range here is the printing unit acting during the 3D object printing process, such as the progressive range of a single print. The folded contour map of each layer is the progressive range of a single print. Since the 3D object model is in a certain pose in the illumination space model, and the actual printing is also in the printing space of the 3D printing device in this pose, the contour map is folded according to the first illumination range to obtain a multi-layer folded contour map. The folded contour maps of each layer are respectively oriented corresponding to the first illumination range, and the corresponding relationship between the folded contour map of each layer and the sub-range on the first illumination range is obtained. It can be obtained that the range of unit illumination on each folded contour map is the range corresponding to a single infrared lamp, and then the corresponding relationship between each folded contour map and the entire infrared lamp array can be obtained. Based on the corresponding relationship between the folded contour map of each layer and the sub-range, the space-bound sub-range, the mapping channel, and the projection range, the infrared lamps corresponding to each folded contour map are obtained. For each folded contour map, the infrared light wavelength parameters of the infrared lamps in the corresponding infrared lamp array are set to obtain the target infrared lamp array. The target infrared lamp arrays corresponding to the folded contour maps of each layer are arranged in a rolling layout according to the printing sequence before and after of the 3D object. Here, the rolling layout is to sort the target infrared lamp arrays corresponding to the folded contour maps of each layer according to the printing sequence before and after of the 3D object. After the 3D object is irradiated by one target infrared lamp array during the printing process, the next irradiation is sorted to the next target infrared lamp array until the entire 3D object is printed. The 3D printing model after the rolling layout is used as the required 3D printing model, which can ensure the accuracy and orderliness of the color change excitation of the 3D object during the printing process, and better ensure the printing quality of the 3D printed object;

[0081] In one embodiment, step S4 of controlling the illumination of the infrared lamp array and the ultraviolet lamp array respectively according to the required 3D printing model and then completing the printing of the 3D object includes:

[0082] S41. Print the 3D object according to the required 3D printing model. During the printing process of the 3D object, control the infrared light wavelength parameters of the infrared light lamp array through the folded contour map in a rolling layout to excite color change of the 3D object. The principle of the infrared light wavelength parameters of the infrared light lamp array for exciting color change of the 3D object is as follows: The infrared-excited color-changing ultraviolet-curable 3D printing material is composed of resin and photoinitiator monomers, including additives such as infrared 760nm-excited red pigment, infrared 780nm-excited yellow pigment, infrared 800nm-excited blue pigment, and infrared 920nm-excited black pigment;

[0083] S42. Keep the ultraviolet light lamp array constantly on to cure the 3D object during the printing process until the printing of the 3D object is completed;

[0084] As described in the above steps S41 and S42, here the infrared light wavelength parameters of the infrared light lamp array are used to excite color change of the 3D object. By arranging the target infrared light lamp arrays corresponding to each layer of the folded contour map in a rolling layout according to the printing sequence before and after of the 3D object, the rolling layout here is to sort the target infrared light lamp arrays corresponding to each layer of the folded contour map according to the printing sequence before and after of the 3D object. After one target infrared light lamp array irradiates the 3D object during the printing process, the next one in the sequence irradiates the next target infrared light lamp array until the entire 3D object is printed. Using the 3D printing model after the rolling layout as the required 3D printing model can ensure the accuracy and orderliness of the color change excitation of the 3D object during the printing process, and better ensure the printing quality of the 3D printed object.

[0085] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An infrared-excited color-changing ultraviolet-curable 3D printing method, characterized in that Including the following steps: Set up an infrared light array and an ultraviolet light array, and construct a lighting space model corresponding to the infrared light array and the ultraviolet light array; The step of setting up the infrared light array and the ultraviolet light array and constructing a lighting space model corresponding to the infrared light array and the ultraviolet light array includes: Determine the first lighting space and arrange the infrared light array according to the first lighting space; The step of determining the first lighting space and arranging the infrared light array according to the first lighting space includes: Determine the first arrangement range and the first lighting range, and obtain the space range between the first arrangement range and the first lighting range as the first lighting space; Divide the first lighting range into multiple sub-ranges, and project and map the multiple sub-ranges in the first lighting space onto the first arrangement range respectively to obtain multiple sub-projection ranges; The step of dividing the first lighting range into multiple sub-ranges and projecting and mapping the multiple sub-ranges in the first lighting space onto the first arrangement range respectively to obtain multiple sub-projection ranges includes: Divide the first lighting range into multiple sub-ranges according to the preset unit corresponding to the first lighting range; Perform spatial superposition respectively based on the multiple sub-ranges to obtain mapping channels until the mapping channels pass through the first arrangement range. The surface passing through the first arrangement range is used as the projection range, and the corresponding sub-ranges, mapping channels and projection ranges are spatially bound; Obtain multiple sub-projection ranges through the multiple sub-range spaces; Arrange infrared lights corresponding to the multiple sub-projection ranges respectively, and associate the infrared lights corresponding to the multiple sub-projection ranges as an infrared light array; Determine the second lighting space and arrange the ultraviolet light array according to the second lighting space; Construct a lighting space model according to the infrared light array, the ultraviolet light array and the printing space of the 3D printing device; Determine the 3D target object model, and combine the 3D target object model with the lighting space model to obtain a 3D printing model; Obtain the required lighting information of the 3D target object model, and layout the 3D printing model based on the required lighting information to obtain the required 3D printing model; Mark the required lighting information in the 3D target object model in the 3D printing model; Extract the outer contour of the 3D target object model marked with the required lighting information to obtain a contour map of the required lighting information; Fold the contour map according to the first lighting range to obtain a multi-layer folded contour map, and respectively correspond the folded contour map of each layer to the first lighting range in terms of orientation; Obtain the corresponding relationship between the folded contour map of each layer corresponding in orientation and the sub-ranges on the first lighting range; Based on the folded contour map of each layer corresponding to the corresponding relationship and the sub-ranges, as well as the spatially bound sub-ranges, mapping channels and projection ranges, obtain the infrared lights corresponding to the folded contour map of each layer respectively; Corresponding to the folded contour map of each layer, set the infrared light wavelength parameters of the infrared lights in the corresponding infrared light array to obtain a target infrared light array, and perform a rolling layout on the target infrared light array corresponding to the folded contour map of each layer according to the printing sequence before and after of the 3D target object; Take the 3D printing model after the rolling layout as the required 3D printing model; 3D print a model according to requirements, and control the lighting of the infrared lamp array and the ultraviolet lamp array respectively, so as to complete the printing of the 3D object.

2. The infrared excitation color-changing ultraviolet light-curing 3D printing method according to claim 1, wherein: The step of determining the 3D object model and combining the 3D object model with the lighting space model to obtain the 3D printing model further includes: Obtain the shape information of the 3D object, where the shape information includes the shape and the shape color information, and construct the 3D object model according to the shape information; Construct the 3D object model into the lighting space model to obtain the combined 3D printing model.

3. The infrared excitation color-changing ultraviolet light-curing 3D printing method according to claim 1, wherein: The step of obtaining the required lighting information of the 3D object model, laying out the 3D printing model based on the required lighting information, and obtaining the required 3D printing model further includes: Obtain the corresponding required lighting information according to the shape color information on the 3D object model, where the required lighting information includes the required infrared light irradiation range and the corresponding required infrared light wavelength.

4. The infrared excitation color-changing ultraviolet light-curing 3D printing method according to claim 1, wherein: The step of controlling the lighting of the infrared lamp array and the ultraviolet lamp array respectively according to the required 3D printing model, and then completing the printing of the 3D object includes: Print the 3D object according to the required 3D printing model. During the printing of the 3D object, control the infrared light wavelength parameter of the infrared lamp array by scrolling the folded contour map of the layout, and stimulate color change of the 3D object; The ultraviolet lamp array is always on to cure the 3D object during the printing process until the printing of the 3D object is completed.

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